1. Ali Bahu
09/24/2012
CLOUD COMPUTING

2. INTRODUCTION
 Cloud computing is the use of both hardware
and software resources that are delivered as
a service over a network.
 The name cloud computing comes from the
cloud-shaped symbol that is used to
represent the complex infrastructure of the
system design.

3. TYPES OF CLOUD COMPUTING
 Infrastructure as a service (IaaS)
 Platform as a service (PaaS)
 Software as a service (SaaS)
 Storage as a service (STaaS)
 Security as a service (SECaaS)
 Data as a service (DaaS)
 Test environment as a service (TEaaS)
 Desktop as a service (DaaS)
 API as a service (APIaaS)

4. INFRASTRUCTURE AS A SERVICE
 Consumers control and manage the systems in terms of the
operating systems, applications, storage, and network
connectivity, but do not themselves control the cloud
infrastructure.

5. PLATFORM AS A SERVICE
 Consumers purchase access to the platforms, enabling them to
deploy their own software and applications in the cloud. The
operating systems and network access are not managed by the
consumer, and there might be constraints as to which applications
can be deployed.

6. SOFTWARE AS A SERVICE
 Consumers purchase the ability to access and use an application
or service that is hosted in the cloud.

7. CHARACTERISTICS
 API
 Agility
 Cost
 Security
 Maintenance
 Virtualization
 Performance
 Scalability & elasticity
 Device & location independence

8. CHALLENGES
 Lack of Standards
 Security and Privacy
 Continuously Evolving
 Compliance Concerns

9. DEPLOYMENT MODELS
 Private Cloud:
The cloud infrastructure has been deployed, and is maintained and operated for a specific
organization. The operation may be in-house or with a third party on the premises.
 Community Cloud:
The cloud infrastructure is shared among a number of organizations with similar interests and
requirements. This may help limit the capital expenditure costs for its establishment as the costs are
shared among the organizations. The operation may be in-house or with a third party on the
premises.
 Public Cloud:
The cloud infrastructure is available to the public on a commercial basis by a cloud service provider.
This enables a consumer to develop and deploy a service in the cloud with very little financial outlay
compared to the capital expenditure requirements normally associated with other deployment
options.
 Hybrid Cloud:
The cloud infrastructure consists of a number of clouds of any type, but the clouds have the ability
through their interfaces to allow data and/or applications to be moved from one cloud to another. This
can be a combination of private and public clouds that support the requirement to retain some data in
an organization, and also the need to offer services in the cloud.

10. PUBLIC, PRIVATE & HYBRID
DEPLOYMENT

11. COMMUNICATIONS IN THE CLOUD
 Web APIs:
Accessing communications capabilities
in a cloud-based environment is
achieved through APIs, primarily Web
2.0 RESTful APIs, allowing application
development outside the cloud to take
advantage of the communication
infrastructure within it.
 Media Server Control Interfaces
 Communications Services

12. COMPANIES DELIVERING CLOUD
SERVICES
 Google
 Microsoft
 Amazon
 Apple
 Salesforce